Reliance Jio on Wednesday launched voice and video calling over Wi-Fi service that will allow customers to switch seamlessly from LTE to Wi-Fi-based calling when they are at home or office. The company said Jio Wi-Fi calling - which works on the largest ecosystem of handsets - will also allow users to make video calls over Wi-Fi. The service would be available for free.

The announcement comes less than a month after rival Airtel launched a similar service in Delhi-NCR. Jio said it has been "testing this service over the past few months to provide a robust experience to every customer at launch".